Try-square.



BATENTED MAY 16, 1905.

TRY SQUARE.

APPLICATION FILED SEPT. 27, 1904.

D. F. LARKIN.

BEST AVAILABLE COP UNITED STATES SPECIFICATION forming part of Letters Patent No. 790,141, dated May 16, 1905.

Application filed September 27, 1904. Serial No. 226,102. I

To all whom, it may concern:

Be it known that I, DENNIS FRANK LAR- KIN, a citizen of the United States, residing at San Francisco, county of San Francisco, and State of California, have invented a certain new and useful Improvement in Try- Squares, of which the following is a specification.

My invention relates to a new and useful improvement in trysquares, and has for its object to provide a simple durable square for conveniently squaring flooring and other nar row material.

With this end in view this invention consists in the details of construction and com bination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the construction and operation will now be described in detail, referring to the accompanying drawings, forming a part of this specification, in which-- Figure 1 is a plan view of my improved square; Fig. 2, a section taken on the line 2 2 of Fig. 1; Fig. 3, an edge view of the square; Fig. 4, a section taken on the line 4 4 of Fig.1.

A represents the body of the square, which is formed of two members arranged at right angles to one another, represented by B and C.

D is a metal rod extending the full length of the member B and a slight distance above the upper surface of the same, said rod being supported at each end in the supports E, which supports are secured to the blade together with the rod, by the rivets E.

F is a sleeve adapted to slide upon the rod D.

G is an arm formed with the sleeve and extending outward to the outer edge of the member B, where it turns at right angles and runs parallel and flush with the outer edge of the bar B and is adapted to rest upon the blade.

H is a washer-clamp secured to the outer surface of the arm G by means of a screw H. The inner surface of the washer H is grooved, and in this groove is adapted to lie a point BEST AVAILABLE co Patented my 16,190? i PATENT OFFICE.

I, which is clamped in position when 1' screw H is tightened,'the point I extendi short distance below the lower surface of, blade A. y 5

J is a rib secured to the under side of th blade A and extending along the outer e of the member 0 and flush with the sa' each end of the rib being turned at right' gles and running a short distance flush W1 the outer end of the member 0 and an eq distance flush with the outer edge of t member B. This rib forms an edge whic designed to be held against the board to squared.

By the use of this device a mechanic be able to square 9. board without the aidjof a pencil or any other article, and it is done simply holding the square on the board drawing the arm G from one end of square to the other.

Of course I do not wish to'be limited to th exact construction here shown, as sli modifications could be made Without dep in from the spirit of my invention.

Having thus fully described my inventi what I claim as new and useful is- 1. In a try-square of the character scribed, a flat blade consisting of'two rigli angle members B and O, a rib extendin downward and running parallel with one member, a rod extending parallel with t other member a slight distance above t surface of the same and-supported at ca; end, a sleeve adapted to slide upon said ro an arm extending outward to the outer edg of said member from said sleeve, a scratch? point removably clamped to the outer end of said arm so that the point will extend a slight distance below the lower surface of the blade, as and for the purpose specified. V V

2. As a new article of manufacture, 9. tr square consisting ,of a flat blade, said blade composed of two rightangle members B and C, a rib secured to the lower surface of the; blade and extending parallel and flush with; the outer edge of the member 0, each end of the rib turned at right angles, one end extending a short distance along the outer edge of the end of the member 0 and flush therewith, the other end extending the sa 'distitnce along the outer edge of the member 1 3 B; and flush therewith, a rod arran ed above E hefjmember B and extending parallel there. 7 from, standards at each end to which the rod s'ecured, 'a sleeve ada ted to slide upon rod, an arm forme integral with the Teive and extending outward to the outer of the member B said arm then turning {right angles and extending parallel and with the outer edge of the member B, a filler-clamp secured to the outer end of the a scratch-point adapted to be clamped BEST AVAILABLE COP DENNIS FRANK LARKIN.

Witnesses:

A. J. HENRY, Co BERT CALDWELL. 

